add image transform

app/src/main/java/com/chad/baserecyclerviewadapterhelper/adapter/DefAdpater.java

@@ -14,20 +14,24 @@
 import com.chad.baserecyclerviewadapterhelper.entity.Status;
 
 import java.util.List;
+
 /**
  * https://github.com/CymChad/BaseRecyclerViewAdapterHelper
  */
 public class DefAdpater extends RecyclerView.Adapter<DefAdpater.ViewHolder> {
     private final List<Status> sampleData = DataServer.getSampleData(100);
     private Context mContext;
+
     public DefAdpater(Context context) {
         mContext = context;
-    } 
-   @Override
+    }
+
+    @Override
     public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
         View item = LayoutInflater.from(parent.getContext()).inflate(R.layout.tweet, parent, false);
         return new ViewHolder(item);
     }
+
     @Override
     public void onBindViewHolder(ViewHolder holder, int position) {
         Status status = sampleData.get(position);
@@ -37,16 +41,19 @@ public void onBindViewHolder(ViewHolder holder, int position) {
         Glide.with(mContext).load(status.getUserAvatar()).into(holder.avatar);
         holder.rt.setVisibility(status.isRetweet() ? View.VISIBLE : View.GONE);
     }
+
     @Override
     public int getItemCount() {
         return sampleData.size();
     }
+
     public static class ViewHolder extends RecyclerView.ViewHolder {
         private ImageView avatar;
         private ImageView rt;
         private TextView name;
         private TextView date;
         private TextView text;
+
         public ViewHolder(View itemView) {
             super(itemView);
             text = (TextView) itemView.findViewById(R.id.tweetText);

app/src/main/java/com/chad/baserecyclerviewadapterhelper/adapter/QuickAdapter.java

@@ -5,6 +5,7 @@
 import com.chad.baserecyclerviewadapterhelper.R;
 import com.chad.baserecyclerviewadapterhelper.data.DataServer;
 import com.chad.baserecyclerviewadapterhelper.entity.Status;
+import com.chad.baserecyclerviewadapterhelper.transform.GlideCircleTransform;
 import com.chad.library.adapter.base.BaseQuickAdapter;
 import com.chad.library.adapter.base.BaseViewHolder;
 
@@ -25,7 +26,7 @@ protected void convert(BaseViewHolder helper, Status item) {
         helper.setText(R.id.tweetName, item.getUserName())
                 .setText(R.id.tweetText, item.getText())
                 .setText(R.id.tweetDate, item.getCreatedAt())
-                .setImageUrl(R.id.tweetAvatar, item.getUserAvatar(), R.mipmap.ic_launcher)
+                .setImageUrl(R.id.tweetAvatar, item.getUserAvatar(), R.mipmap.ic_launcher, new GlideCircleTransform(mContext))
                 .setVisible(R.id.tweetRT, item.isRetweet())
                 .setOnClickListener(R.id.tweetAvatar, new OnItemChildClickListener())
                 .setOnClickListener(R.id.tweetName, new OnItemChildClickListener())

app/src/main/java/com/chad/baserecyclerviewadapterhelper/transform/GlideCircleTransform.java

@@ -0,0 +1,53 @@
+package com.chad.baserecyclerviewadapterhelper.transform;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.BitmapShader;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+
+import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;
+import com.bumptech.glide.load.resource.bitmap.BitmapTransformation;
+
+/**
+ * Created by tb on 16/5/3.
+ */
+public class GlideCircleTransform extends BitmapTransformation {
+
+    public GlideCircleTransform(Context context) {
+        super(context);
+    }
+
+    @Override
+    protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) {
+        return circleCrop(pool, toTransform);
+    }
+
+    private static Bitmap circleCrop(BitmapPool pool, Bitmap source) {
+        if (source == null) return null;
+
+        int size = Math.min(source.getWidth(), source.getHeight());
+        int x = (source.getWidth() - size) / 2;
+        int y = (source.getHeight() - size) / 2;
+
+        Bitmap squared = Bitmap.createBitmap(source, x, y, size, size);
+
+        Bitmap result = pool.get(size, size, Bitmap.Config.ARGB_8888);
+        if (result == null) {
+            result = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
+        }
+
+        Canvas canvas = new Canvas(result);
+        Paint paint = new Paint();
+        paint.setShader(new BitmapShader(squared, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));
+        paint.setAntiAlias(true);
+        float r = size / 2f;
+        canvas.drawCircle(r, r, r, paint);
+        return result;
+    }
+
+    @Override
+    public String getId() {
+        return getClass().getName();
+    }
+}

library/src/main/java/com/chad/library/adapter/base/BaseViewHolder.java

@@ -21,6 +21,8 @@
 import android.widget.TextView;
 
 import com.bumptech.glide.Glide;
+import com.bumptech.glide.load.Transformation;
+import com.bumptech.glide.load.resource.bitmap.BitmapTransformation;
 
 
 /**
@@ -164,6 +166,12 @@ public BaseViewHolder setImageUrl(int viewId, String imageUrl, int defResourceId
         return this;
     }
 
+    public BaseViewHolder setImageUrl(int viewId, String imageUrl, int defResourceId, BitmapTransformation... transformations) {
+        ImageView view = getView(viewId);
+        Glide.with(context).load(imageUrl).crossFade().placeholder(defResourceId).transform(transformations).into(view);
+        return this;
+    }
+
 
     /**
      * Add an action to set the image of an image view. Can be called multiple times.